Specific heat capacity: Difference between revisions
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<div class="definition"><div class="short_definition">( | <div class="definition"><div class="short_definition">(''Or'' specific heat.) The [[heat capacity]] of a system divided by its mass.</div><br/> <div class="paragraph">It is a property solely of the substance of which the system is composed. As with heat capacities, specific heats are commonly defined for processes occurring at either constant volume (''c''<sub>''v''</sub>) or constant [[pressure]] (''c''<sub>''p''</sub>). For an [[ideal gas]], both are constant with [[temperature]] and related by ''c''<sub>''p''</sub> = ''c''<sub>''v''</sub> + ''R'' with ''R'' the [[gas constant]]. For [[dry air]] at 273 K, <div class="display-formula"><blockquote>[[File:ams2001glos-Se42.gif|link=|center|ams2001glos-Se42]]</blockquote></div><div class="display-formula"><blockquote>[[File:ams2001glos-Se43.gif|link=|center|ams2001glos-Se43]]</blockquote></div> For [[moist air]], the specific heat capacities of the dry air and [[water vapor]] must be combined in proportion to their respective mass fractions.</div><br/> </div><div class="reference">Dutton, J. A. 1995. Dynamics of Atmospheric Motion. Dover Press, . 41–45, 406–410. </div><br/> <div class="reference">Sommerfeld, A. 1964. Thermodynamics and Statistical Mechanics. Academic Press, . p. 45. </div><br/> | ||
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Latest revision as of 15:10, 20 February 2012
specific heat capacity
(Or specific heat.) The heat capacity of a system divided by its mass.
It is a property solely of the substance of which the system is composed. As with heat capacities, specific heats are commonly defined for processes occurring at either constant volume (cv) or constant pressure (cp). For an ideal gas, both are constant with temperature and related by cp = cv + R with R the gas constant. For dry air at 273 K, For moist air, the specific heat capacities of the dry air and water vapor must be combined in proportion to their respective mass fractions.
Dutton, J. A. 1995. Dynamics of Atmospheric Motion. Dover Press, . 41–45, 406–410.
Sommerfeld, A. 1964. Thermodynamics and Statistical Mechanics. Academic Press, . p. 45.
